长春市郊区基本农田防护区土壤重金属污染调查

Heavy Metal Pollution of Soil in Basic Farmland Conservation Area of Changchun Suburb

为了解长春市基本农田防护区土壤与作物的重金属污染状况,对长春市西北郊的基本农田的土壤环境质量进行了监测,共布设监测点20个,监测项目为Pb、Cd、Cu、Zn、Ni、Cr和pH。结果表明:土壤样品的重金属检出率为100%。土壤中Cu的单项污染指数较高,部分试验点已达轻污染水平,其次Ni的单项污染指数也相当高,但未达污染水平,其他元素未见污染。各试验点的综合污染指数均小于1,污染等级为警戒级与安全级,污染水平达到清洁和尚清洁,较适合粮食及蔬菜等农作物的种植。

The research was conducted to investigate the heavy metal soil pollution in basic farmland conservation area of north- west Changchun suburb. There were 20 monitoring sites. The monitoring items were the contents of Pb, Cd, Cu, Zn, Ni, Cr and pH. The heavy metal detection rate of the soil sample is 100%. The soil monomial pollution index of Cu is higher, and most sites are light polluted. The soil monomial pollution index of Ni is relatively higher, it do not reach the pollution level. The other elements do not appear in the soil. The soil comprehensive pollution index of each point is under 1, the pollution grade is divided into warning grade and safety grade. The pollution level reaches clean level suitable for growing grain and vegetables.